1///===-- Representation.cpp - ClangDoc Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the merging of different types of infos. The data in the
10// calling Info is preserved during a merge unless that field is empty or
11// default. In that case, the data from the parameter Info is used to replace
12// the empty or default data.
13//
14// For most fields, the first decl seen provides the data. Exceptions to this
15// include the location and description fields, which are collections of data on
16// all decls related to a given definition. All other fields are ignored in new
17// decls unless the first seen decl didn't, for whatever reason, incorporate
18// data on that field (e.g. a forward declared class wouldn't have information
19// on members on the forward declaration, but would have the class name).
20//
21//===----------------------------------------------------------------------===//
22#include "Representation.h"
23#include "llvm/Support/Error.h"
24#include "llvm/Support/Path.h"
25
26namespace clang {
27namespace doc {
28
29namespace {
30
31const SymbolID EmptySID = SymbolID();
32
33template <typename T>
34llvm::Expected<std::unique_ptr<Info>>
35reduce(std::vector<std::unique_ptr<Info>> &Values) {
36 if (Values.empty() || !Values[0])
37 return llvm::createStringError(EC: llvm::inconvertibleErrorCode(),
38 Msg: "no value to reduce");
39 std::unique_ptr<Info> Merged = std::make_unique<T>(Values[0]->USR);
40 T *Tmp = static_cast<T *>(Merged.get());
41 for (auto &I : Values)
42 Tmp->merge(std::move(*static_cast<T *>(I.get())));
43 return std::move(Merged);
44}
45
46// Return the index of the matching child in the vector, or -1 if merge is not
47// necessary.
48template <typename T>
49int getChildIndexIfExists(std::vector<T> &Children, T &ChildToMerge) {
50 for (unsigned long I = 0; I < Children.size(); I++) {
51 if (ChildToMerge.USR == Children[I].USR)
52 return I;
53 }
54 return -1;
55}
56
57template <typename T>
58void reduceChildren(std::vector<T> &Children,
59 std::vector<T> &&ChildrenToMerge) {
60 for (auto &ChildToMerge : ChildrenToMerge) {
61 int MergeIdx = getChildIndexIfExists(Children, ChildToMerge);
62 if (MergeIdx == -1) {
63 Children.push_back(std::move(ChildToMerge));
64 continue;
65 }
66 Children[MergeIdx].merge(std::move(ChildToMerge));
67 }
68}
69
70} // namespace
71
72// Dispatch function.
73llvm::Expected<std::unique_ptr<Info>>
74mergeInfos(std::vector<std::unique_ptr<Info>> &Values) {
75 if (Values.empty() || !Values[0])
76 return llvm::createStringError(EC: llvm::inconvertibleErrorCode(),
77 Msg: "no info values to merge");
78
79 switch (Values[0]->IT) {
80 case InfoType::IT_namespace:
81 return reduce<NamespaceInfo>(Values);
82 case InfoType::IT_record:
83 return reduce<RecordInfo>(Values);
84 case InfoType::IT_enum:
85 return reduce<EnumInfo>(Values);
86 case InfoType::IT_function:
87 return reduce<FunctionInfo>(Values);
88 case InfoType::IT_typedef:
89 return reduce<TypedefInfo>(Values);
90 default:
91 return llvm::createStringError(EC: llvm::inconvertibleErrorCode(),
92 Msg: "unexpected info type");
93 }
94}
95
96bool CommentInfo::operator==(const CommentInfo &Other) const {
97 auto FirstCI = std::tie(args: Kind, args: Text, args: Name, args: Direction, args: ParamName, args: CloseName,
98 args: SelfClosing, args: Explicit, args: AttrKeys, args: AttrValues, args: Args);
99 auto SecondCI =
100 std::tie(args: Other.Kind, args: Other.Text, args: Other.Name, args: Other.Direction,
101 args: Other.ParamName, args: Other.CloseName, args: Other.SelfClosing,
102 args: Other.Explicit, args: Other.AttrKeys, args: Other.AttrValues, args: Other.Args);
103
104 if (FirstCI != SecondCI || Children.size() != Other.Children.size())
105 return false;
106
107 return std::equal(first1: Children.begin(), last1: Children.end(), first2: Other.Children.begin(),
108 binary_pred: llvm::deref<std::equal_to<>>{});
109}
110
111bool CommentInfo::operator<(const CommentInfo &Other) const {
112 auto FirstCI = std::tie(args: Kind, args: Text, args: Name, args: Direction, args: ParamName, args: CloseName,
113 args: SelfClosing, args: Explicit, args: AttrKeys, args: AttrValues, args: Args);
114 auto SecondCI =
115 std::tie(args: Other.Kind, args: Other.Text, args: Other.Name, args: Other.Direction,
116 args: Other.ParamName, args: Other.CloseName, args: Other.SelfClosing,
117 args: Other.Explicit, args: Other.AttrKeys, args: Other.AttrValues, args: Other.Args);
118
119 if (FirstCI < SecondCI)
120 return true;
121
122 if (FirstCI == SecondCI) {
123 return std::lexicographical_compare(
124 first1: Children.begin(), last1: Children.end(), first2: Other.Children.begin(),
125 last2: Other.Children.end(), comp: llvm::deref<std::less<>>());
126 }
127
128 return false;
129}
130
131static llvm::SmallString<64>
132calculateRelativeFilePath(const InfoType &Type, const StringRef &Path,
133 const StringRef &Name, const StringRef &CurrentPath) {
134 llvm::SmallString<64> FilePath;
135
136 if (CurrentPath != Path) {
137 // iterate back to the top
138 for (llvm::sys::path::const_iterator I =
139 llvm::sys::path::begin(path: CurrentPath);
140 I != llvm::sys::path::end(path: CurrentPath); ++I)
141 llvm::sys::path::append(path&: FilePath, a: "..");
142 llvm::sys::path::append(path&: FilePath, a: Path);
143 }
144
145 // Namespace references have a Path to the parent namespace, but
146 // the file is actually in the subdirectory for the namespace.
147 if (Type == doc::InfoType::IT_namespace)
148 llvm::sys::path::append(path&: FilePath, a: Name);
149
150 return llvm::sys::path::relative_path(path: FilePath);
151}
152
153llvm::SmallString<64>
154Reference::getRelativeFilePath(const StringRef &CurrentPath) const {
155 return calculateRelativeFilePath(Type: RefType, Path, Name, CurrentPath);
156}
157
158llvm::SmallString<16> Reference::getFileBaseName() const {
159 if (RefType == InfoType::IT_namespace)
160 return llvm::SmallString<16>("index");
161
162 return Name;
163}
164
165llvm::SmallString<64>
166Info::getRelativeFilePath(const StringRef &CurrentPath) const {
167 return calculateRelativeFilePath(Type: IT, Path, Name: extractName(), CurrentPath);
168}
169
170llvm::SmallString<16> Info::getFileBaseName() const {
171 if (IT == InfoType::IT_namespace)
172 return llvm::SmallString<16>("index");
173
174 return extractName();
175}
176
177bool Reference::mergeable(const Reference &Other) {
178 return RefType == Other.RefType && USR == Other.USR;
179}
180
181void Reference::merge(Reference &&Other) {
182 assert(mergeable(Other));
183 if (Name.empty())
184 Name = Other.Name;
185 if (Path.empty())
186 Path = Other.Path;
187}
188
189void Info::mergeBase(Info &&Other) {
190 assert(mergeable(Other));
191 if (USR == EmptySID)
192 USR = Other.USR;
193 if (Name == "")
194 Name = Other.Name;
195 if (Path == "")
196 Path = Other.Path;
197 if (Namespace.empty())
198 Namespace = std::move(Other.Namespace);
199 // Unconditionally extend the description, since each decl may have a comment.
200 std::move(first: Other.Description.begin(), last: Other.Description.end(),
201 result: std::back_inserter(x&: Description));
202 llvm::sort(C&: Description);
203 auto Last = std::unique(first: Description.begin(), last: Description.end());
204 Description.erase(first: Last, last: Description.end());
205}
206
207bool Info::mergeable(const Info &Other) {
208 return IT == Other.IT && USR == Other.USR;
209}
210
211void SymbolInfo::merge(SymbolInfo &&Other) {
212 assert(mergeable(Other));
213 if (!DefLoc)
214 DefLoc = std::move(Other.DefLoc);
215 // Unconditionally extend the list of locations, since we want all of them.
216 std::move(first: Other.Loc.begin(), last: Other.Loc.end(), result: std::back_inserter(x&: Loc));
217 llvm::sort(C&: Loc);
218 auto Last = std::unique(first: Loc.begin(), last: Loc.end());
219 Loc.erase(CS: Last, CE: Loc.end());
220 mergeBase(Other: std::move(Other));
221}
222
223NamespaceInfo::NamespaceInfo(SymbolID USR, StringRef Name, StringRef Path)
224 : Info(InfoType::IT_namespace, USR, Name, Path) {}
225
226void NamespaceInfo::merge(NamespaceInfo &&Other) {
227 assert(mergeable(Other));
228 // Reduce children if necessary.
229 reduceChildren(Children&: Children.Namespaces, ChildrenToMerge: std::move(Other.Children.Namespaces));
230 reduceChildren(Children&: Children.Records, ChildrenToMerge: std::move(Other.Children.Records));
231 reduceChildren(Children&: Children.Functions, ChildrenToMerge: std::move(Other.Children.Functions));
232 reduceChildren(Children&: Children.Enums, ChildrenToMerge: std::move(Other.Children.Enums));
233 reduceChildren(Children&: Children.Typedefs, ChildrenToMerge: std::move(Other.Children.Typedefs));
234 mergeBase(Other: std::move(Other));
235}
236
237RecordInfo::RecordInfo(SymbolID USR, StringRef Name, StringRef Path)
238 : SymbolInfo(InfoType::IT_record, USR, Name, Path) {}
239
240void RecordInfo::merge(RecordInfo &&Other) {
241 assert(mergeable(Other));
242 if (!llvm::to_underlying(E: TagType))
243 TagType = Other.TagType;
244 IsTypeDef = IsTypeDef || Other.IsTypeDef;
245 if (Members.empty())
246 Members = std::move(Other.Members);
247 if (Bases.empty())
248 Bases = std::move(Other.Bases);
249 if (Parents.empty())
250 Parents = std::move(Other.Parents);
251 if (VirtualParents.empty())
252 VirtualParents = std::move(Other.VirtualParents);
253 // Reduce children if necessary.
254 reduceChildren(Children&: Children.Records, ChildrenToMerge: std::move(Other.Children.Records));
255 reduceChildren(Children&: Children.Functions, ChildrenToMerge: std::move(Other.Children.Functions));
256 reduceChildren(Children&: Children.Enums, ChildrenToMerge: std::move(Other.Children.Enums));
257 reduceChildren(Children&: Children.Typedefs, ChildrenToMerge: std::move(Other.Children.Typedefs));
258 SymbolInfo::merge(Other: std::move(Other));
259 if (!Template)
260 Template = Other.Template;
261}
262
263void EnumInfo::merge(EnumInfo &&Other) {
264 assert(mergeable(Other));
265 if (!Scoped)
266 Scoped = Other.Scoped;
267 if (Members.empty())
268 Members = std::move(Other.Members);
269 SymbolInfo::merge(Other: std::move(Other));
270}
271
272void FunctionInfo::merge(FunctionInfo &&Other) {
273 assert(mergeable(Other));
274 if (!IsMethod)
275 IsMethod = Other.IsMethod;
276 if (!Access)
277 Access = Other.Access;
278 if (ReturnType.Type.USR == EmptySID && ReturnType.Type.Name == "")
279 ReturnType = std::move(Other.ReturnType);
280 if (Parent.USR == EmptySID && Parent.Name == "")
281 Parent = std::move(Other.Parent);
282 if (Params.empty())
283 Params = std::move(Other.Params);
284 SymbolInfo::merge(Other: std::move(Other));
285 if (!Template)
286 Template = Other.Template;
287}
288
289void TypedefInfo::merge(TypedefInfo &&Other) {
290 assert(mergeable(Other));
291 if (!IsUsing)
292 IsUsing = Other.IsUsing;
293 if (Underlying.Type.Name == "")
294 Underlying = Other.Underlying;
295 SymbolInfo::merge(Other: std::move(Other));
296}
297
298BaseRecordInfo::BaseRecordInfo() : RecordInfo() {}
299
300BaseRecordInfo::BaseRecordInfo(SymbolID USR, StringRef Name, StringRef Path,
301 bool IsVirtual, AccessSpecifier Access,
302 bool IsParent)
303 : RecordInfo(USR, Name, Path), IsVirtual(IsVirtual), Access(Access),
304 IsParent(IsParent) {}
305
306llvm::SmallString<16> Info::extractName() const {
307 if (!Name.empty())
308 return Name;
309
310 switch (IT) {
311 case InfoType::IT_namespace:
312 // Cover the case where the project contains a base namespace called
313 // 'GlobalNamespace' (i.e. a namespace at the same level as the global
314 // namespace, which would conflict with the hard-coded global namespace name
315 // below.)
316 if (Name == "GlobalNamespace" && Namespace.empty())
317 return llvm::SmallString<16>("@GlobalNamespace");
318 // The case of anonymous namespaces is taken care of in serialization,
319 // so here we can safely assume an unnamed namespace is the global
320 // one.
321 return llvm::SmallString<16>("GlobalNamespace");
322 case InfoType::IT_record:
323 return llvm::SmallString<16>("@nonymous_record_" +
324 toHex(Input: llvm::toStringRef(Input: USR)));
325 case InfoType::IT_enum:
326 return llvm::SmallString<16>("@nonymous_enum_" +
327 toHex(Input: llvm::toStringRef(Input: USR)));
328 case InfoType::IT_typedef:
329 return llvm::SmallString<16>("@nonymous_typedef_" +
330 toHex(Input: llvm::toStringRef(Input: USR)));
331 case InfoType::IT_function:
332 return llvm::SmallString<16>("@nonymous_function_" +
333 toHex(Input: llvm::toStringRef(Input: USR)));
334 case InfoType::IT_default:
335 return llvm::SmallString<16>("@nonymous_" + toHex(Input: llvm::toStringRef(Input: USR)));
336 }
337 llvm_unreachable("Invalid InfoType.");
338 return llvm::SmallString<16>("");
339}
340
341// Order is based on the Name attribute: case insensitive order
342bool Index::operator<(const Index &Other) const {
343 // Loop through each character of both strings
344 for (unsigned I = 0; I < Name.size() && I < Other.Name.size(); ++I) {
345 // Compare them after converting both to lower case
346 int D = tolower(c: Name[I]) - tolower(c: Other.Name[I]);
347 if (D == 0)
348 continue;
349 return D < 0;
350 }
351 // If both strings have the size it means they would be equal if changed to
352 // lower case. In here, lower case will be smaller than upper case
353 // Example: string < stRing = true
354 // This is the opposite of how operator < handles strings
355 if (Name.size() == Other.Name.size())
356 return Name > Other.Name;
357 // If they are not the same size; the shorter string is smaller
358 return Name.size() < Other.Name.size();
359}
360
361void Index::sort() {
362 llvm::sort(C&: Children);
363 for (auto &C : Children)
364 C.sort();
365}
366
367ClangDocContext::ClangDocContext(tooling::ExecutionContext *ECtx,
368 StringRef ProjectName, bool PublicOnly,
369 StringRef OutDirectory, StringRef SourceRoot,
370 StringRef RepositoryUrl,
371 std::vector<std::string> UserStylesheets,
372 std::vector<std::string> JsScripts)
373 : ECtx(ECtx), ProjectName(ProjectName), PublicOnly(PublicOnly),
374 OutDirectory(OutDirectory), UserStylesheets(UserStylesheets),
375 JsScripts(JsScripts) {
376 llvm::SmallString<128> SourceRootDir(SourceRoot);
377 if (SourceRoot.empty())
378 // If no SourceRoot was provided the current path is used as the default
379 llvm::sys::fs::current_path(result&: SourceRootDir);
380 this->SourceRoot = std::string(SourceRootDir);
381 if (!RepositoryUrl.empty()) {
382 this->RepositoryUrl = std::string(RepositoryUrl);
383 if (!RepositoryUrl.empty() && !RepositoryUrl.starts_with(Prefix: "http://") &&
384 !RepositoryUrl.starts_with(Prefix: "https://"))
385 this->RepositoryUrl->insert(pos: 0, s: "https://");
386 }
387}
388
389} // namespace doc
390} // namespace clang
391

source code of clang-tools-extra/clang-doc/Representation.cpp